title: Capability of Thai Mission grass (Pennisetum polystachyon) as a new weedy lignocellulosic feedstock for production of monomeric sugar.
abstract: Mission grass (Pennisetum polystachyon) grown in Pakchong District, Nakornratchasima Province, Thailand, with high cellulose and hemicellulose contents were harvested to determine the fermentable monomeric sugars for bioethanol production by two-stage microwave/chemical pretreatment process. Microwave-assisted NaOH pretreatment effectively removed approximately 85% lignin content in Mission grass, using 3% (w/v) NaOH, 15:1 liquid-to-solid ratio (LSR) at 120 °C temperatures for 10 min. As a result, in the second stage, microwave-assisted H2SO4 pretreatment of an alkaline-pretreated Mission grass solid releasedan impressively high fermentable sugar content (34.3±1.3 g per 100 g of dried biomass), consisting mainly of 31.1±0.8 g of glucose per 100 g of dried biomass, using 1% (w/v) H2SO4, 15:1 LSR at 200 °C temperature for a very short pretreatment time (5 min). The total monomeric sugar yield obtained via two-stage microwave/chemical process was 40.9 g per 100 g of dried biomass.
authors.affiliation: The Petroleum and Petrochemical College, Center of Excellence for Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Patomwat
authors.initials: P
authors.lastname: Tatijarern
authors.forename: Sirirat
authors.initials: S
authors.lastname: Prasertwasu
authors.forename: Tidarat
authors.initials: T
authors.lastname: Komalwanich
authors.forename: Thanyalak
authors.initials: T
authors.lastname: Chaisuwan
authors.forename: Apanee
authors.initials: A
authors.lastname: Luengnaruemitchai
authors.forename: Sujitra
authors.initials: S
authors.lastname: Wongkasemjit
mesh_terms: D002241:Carbohydrates / Q000096:biosynthesis*; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D008031:Lignin / Q000378:metabolism*; D008855:Microscopy, Electron, Scanning; D008872:Microwaves; D031782:Pennisetum / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared; D013464:Sulfuric Acids / Q000737:chemistry
chemical_list: D002241:Carbohydrates; D013464:Sulfuric Acids; C036909:lignocellulose; D008031:Lignin; C033158:sulfuric acid
keywords: Bioethanol production; Lignocellulosic biomass; Microwave irradiation; Two-stage pretreatment